LV, AC, and DC Surge Suppressors

This section provides instructions for replacing the LV Low Voltage, AC, and DC surge suppressors in the Power Block.

Required Tools and Materials

Phillips screwdriver

Before You Begin

Before servicing the component, complete the following steps:

1. Power off.

2. Remove front upper, mid, and lower panels.

3. Remove front door.

4. Remove the right or left side transparent shield.

   • Right side for LV Low Voltage, AC, and DC input surge suppressors.

   • Left side for DC output A and B surge suppressors.

AFTER REPLACING THE COMPONENTS, REVERSE THE ABOVE STEPS TO COMPLETE THE SERVICE.

Replace the Surge Suppressor

1. Loosen the screws to disconnect the wires connected to a surge suppressor. Use Phillips screwdriver.

   • Low voltage (LV Low Voltage) output surge suppressor.

     Torque the screws to 4.5 Nm (39.8 in-lb) when reconnecting the wires.

     

   • AC input surge suppressor.

     Torque the screws to 4.5 Nm (39.8 in-lb) when reconnecting the wires.

     

   • DC input surge suppressor.

     Torque the screws to 4 Nm (35.4 in-lb) when reconnecting the wires.

     

   • DC output surge suppressor A (right side) or B (left side).

     Torque the screws to 4 Nm (35.4 in-lb) when reconnecting the wires.

     

2. Pull the latch on a surge suppressor and then tilt out the surge suppressor to remove it.

   LV Low Voltage Out	AC In	DC Out A	DC In and Out B

Reverse the above steps to reinstall with replacement FRU Field Replaceable Unit.